Rollup merge of #145353 - CathalMullan:jemalloc-tools, r=Kobzol

bootstrap: Fix jemalloc 64K page support for aarch64 tools

Resolves rust-lang/rust#133748

The prior page size fix only targeted the compile build step, not the tools step: https://github.com/rust-lang/rust/pull/135081

Also note that since `miri` always uses jemalloc, I didn't copy the `builder.config.jemalloc(target)` check to the tools section.

Tested by running `strings` on the compiled `miri` binary to see the LG_PAGE value.

Before:

```
> strings miri | grep '^LG_PAGE'
LG_PAGE 14
```

After:

```
> strings miri | grep '^LG_PAGE'
LG_PAGE 16
```

May also need a separate fix for the standalone miri repository: https://github.com/rust-lang/miri/issues/4514 (likely a change needed in miri-script?)

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